Examine source code of Deep Deep Forest

{
  "theme": {
    "images": {
      "theme_frame": "1.jpg"
    },
    "colors": {
      "frame": "#262424",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Deep Deep Forest",
  "manifest_version": 2,
  "description": "fall, autumn, forest, woods, light, trees, light, morning, enchantment, twilight\n\nDesigned by MaDonna"
}